Universal grinding-machine.



Patented se t. n, 1900.

E. s. LEA. UNIVERSAL GRINDING MACHINE.

- (Application filed Jan. 27, 1.903;)

5 Sheets-Sheet I.

(No Model.)

QEQE IN YEA/T019 WI TNE SSE 8 MI, $57,905. y I Patented Sept. ll; I900.

E.-S. LEA. UNIVERSAL GRINDING MACHINE.

(Application filed Jan. 27, 1800.) U (m Modal.) 5 shear-sheet z.

will Dim) Q- I 4/ as WITNESSES: INVENTOR.

Edwai'd XLQOL;

Patented Sept. ll, I900.

No. 657,9U5.

E. s. LEA.

UNIVERSAL GRINDING omma.

(Application-filed Jan. 27, 1900.)

5 Sheets-Sheet 3.

(No Model.)

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I]; g I 1 sir I mvmron EdwaMSfiLew,

WITNESSES m. mmos. Patented Sept. u, I900. E. S. LEA.'

UNIVERSAL GRINDING MACHINE.

(Application filed Jan. 27, 1900.) (No Model.) 5 Sheets-Sheet 4.

Du Q 8 m u I V q 3 .M

WITNESSES .Patented Sap t. n, I900.

m. wmus.

E. s. LEA. UNIVERSAL GRINDING MACHINE.

(Application filed Jamgl, 1900.

5 haets8haat- 5.

(No Model.)

E IIIIIIIII/III/II M VE/VlOfi E 0120027118 L e of W/ T/VESSE lTED STATES 1 ATENT "OFFICE.

ED\ HZRD S. LEA, OF ELVVOOD, INDIANA, ASSIGNOR TO THE ANDERSON TOOL COMPANY, OF ANDERSON, INDIANA.

UNlVERSAL GRBNDlNG-ACHINE.

SPECIHCATION forming part t. Letters Patent No. 657,905, dated September 11, 1900. Application filed January 27, 1900. Serial lie- 3,054. (N0 model.)

1'0 aZZ whom, it may concern:

Be it known that I, Enwa'sb S. LEA, acitizen of the United States, residing at Elwood, in the county of Madison and State of Iridiana, have invented certain new and useful mprovements in Universal Grinding-Machines, of which the following is a specification.

The object of myinvention is to produce a grinding machine of simple construction adapted to a larg variety of worlr and in which the usual driving-belts, together with the intricate and complicated counter-shaft mechanism incident thereto, shall be wholly dispensed with. I

In carrying out my object I provide a machine inwhich the various parts are ad j ustable in relation to each other in numerous directions, and II employ as a driving force small independent m0l0rs,'0ne of which drives the grinding-wheel and another the work-' carrying spindles.

A machine embodying my said invention will be first fully described, and the novel features thereof then pointed out in the claims.

Referring to the accompanying drawings, which are made a part hereof, and on which similar reference characters indicate similar parts, Figure 1 is a top or plan view of a grindingmachine embodying my said invention; Fig. 2,a side elevation thereof; Fig. 3, a front elevation; Fig. 4, a central vertical sectional view as seen when looking in the direction .indicatedfi'om the dotted lines 4 4 in Eight 1 and 3; Fig. 5, a vertical central sectional view as seen when looking in the direction indicated by the arrows from th dotted lines 5 5 in Figs. 1, 2, and 4.

As in the case of many machine-tools, a desirable construction for the frame is that of a hollow casting. I therefore provide as the main frame a hollow cast base. The main portion 1 of this base is capable of carrying the other parts. Upon one member thereof is an upper portion 2, nponwhich the workcarrying devices are directly mounted. A door 3 provides access to the interior of said base. 0n the upper portion 2 I first mount a'carriage -i, which is adapted' to be driven longitudinally thereon by means of a long screw 5, engaging with a screw-pinion 6, the latter of which is mounted on ashaft 7, operated byahand-wheel 8. A spring lockingpin 9 is mounted in the base portion 2 in such enter a perforation in the side thereof and lock the same from revolving when desired.

10,,by which it may be revolved when desired. By this means I am enabled to drive the carriage back and forth either slowly or rapidly, asI may desire. When the lockingpin 9 is withdrawn, then by rotating the shaft (by means of the hand-wheel 8) the screw 5 and pin 6 become in cffect'a rack and pinion, and the rack is driven rapidly back and forth by the pinion. When, however, the pinion 6 is locked by means of the pin 9, then. it becomes a screwnut, with which the screw 5 engages, and when said screw is revolved (by means of its handle 10) a slow motion is imparted to thaphrriage. This adaptability to a fast or a slow motion at will is of 'great advantage in adapting the machine to val-i ous classes of work, as will be obvious to those skilled in the art.

Upon the carriage 4 is mounted'a table 11, which is secured to the said carriage at a central point by apivot-pin 12 and is also fastened to said carriage at the endsby bolts 13 and 14, which passthrough segmental slots in said table and enter screw-threaded perforations in said carriage. understood, the table when the bolts 13 and 14 are loosened may be shifted on its pivot-pin 12 to any position desired wit-bin the limit provided for by the segmentalslots, and upon tightening down said bolts 13 and 14 the table will be asfirm'ly secured-in any one of its adjusted-positions as in any other.

Mounted upon the table 11 are the headstock 15 and the tail-stock 16, in which are work-carrying spindles l7 and 18, between 'Which the article to be ground is usually socured. upper side of the tablell, extending throughthrough suitable portions of the headstock which the same are secured in place on said The long carriage-screw 5 has also a handle As will be readily There is a T-shaped groove in the and tail-stock, respectively,.a'nd by means of.

relation to the pinion 0 that it is adapted to out its length, in which the'heads of T-headed bolts 19 and 20 are placed, which bolt-s pass up suitable handl- 43. aud43. By this 65 them; 'By locccningald cl'ampdrol table. As will be readily understood, by loosening these bolts said herfdstock and tail-stock may be moved toward or from each other to any part desired and there securely fastened by retighteuing said bolts.- head-sto'ck is also rotatable upon a vertical axis coincident with the bolt 19,'fso that when it is desired to present the work 'carried by the head-stock. to the grinding-wheel at a difierentangle horizontally it may be done by swinging said head-stock to the desired position on the vertical axis-bolt 19. As indicated in Fig. 3,suita-ble graduations are prev'ided on the base of the head-stock, by which 15 .the point of adjustment may be properly determined. The spindle 17 in the head stock has a spur-gear 21, and this is driven by a.

spur-pinion 22 on the annaturer-shaft ofan electric motor 23, which is mounted on the head-stock alongside said spindle. It wili 1 therefore be seen that the only driving means connected with anything outside the machine itself are ordinary electric line-wires 24 and 25, which do not need any complicated counter-shaft gearing for their accommodation, but are themselves capable ofbeing easily bent in any direction sufficientlyte accornmodate' the movements to whichthe headstock spindle which the motor drives is subjected. f. o

On an oflfset portion of the base 1 I mount first a gear-carrying case and upon this 'a hollow standard 31, within which in turn I mount a hollow sleeve 32, the upper end of frame and the mechanismwhichoperates said grinder. Within the gear-case 30 is a-hollow shaft 33, the upper portion of which is=screwthreaded and engages with a nut 34 on the bottom of the hollow sleeve 32, thus operating to elevate or lower said sleeve32 and the grinder and other parts carried thereby. Said hollow shaft has upon its lower-end a bevel gear-whfiel 35, with which a bOVOl-Plll'.

.ion36 engages, which pinionis on a shaft-37, which leads up diagonally through the of the machine to the outside thereof, when it is provided with a hand-wheel 38 within convenient reach of the operator. The hollow standard 31 is provided with a spline 39, which enters. col-Impending groove in'the other side of the hollowclccvc 32,11y which said slceveis prevented-frorotctinfl in said standard. Ono cidc of cold standard is-divided, and through can alongside of fire divjding-slit are clamp-bolls 40 and 41, havmcanc the hollow alcove-(when raised or doc?- ered to thcdcclrcd pcn'tiol) can he clam 6 rigidly in on W containing it,so 1; the two are in effect substantially intcgrah 'Ihcstandard 31ishcld ontothepcrtby which it is carried by clamp-bolts, the heads of which enter suitablcclctn to receive s13 13% may be cwivclcd on its fica'i axis, thus prcccctingthc grinder mcch- The which develops into a base for the grinderacism at any angle desired. The adjacent edges of the parts held together by these clamp-bolts are provided with suitable graduations, 'as shown in Fig. 2, whereby the relative positions may be adj nstably determined.

Within the hollow shaft 33 is. a vertical shaft 45, the lower end of which is key-seated for a considerable distance, and on the boy.-

eled gear-wheel 46, through which said shaft ,is aspline which engages withsaidkeyseat. I A piniojn 47 engages with thespur gear- .wheel46, and i s shaft 48, like the shaft 37, passes up diagonally through the base of the machine to the outside, where it is provided with a handle 49, by which the operator can manipulate it. The splined connection between the shaft and the hub of the gearwheel 46 permits said shaft to bemoved'up and down asthe hollow sleeve 32 is moved the upper end of the shaft 45 is a bevel-pin- .ion 50,; which -engages'with a bevel-pinion face of a nut 51, mounted on bearings in the grinder-base on the upper end of the hollow sleeve 32. Extending through this out 51 is a screw 52, which drives the carriage 53, on which the grinder is directly mounted. The operator then by revolving the handle 49 is enabled to move the grinder-carriage and the grinder. carried" thereby Iback and forthtoward or from himself, as desired, while "by revolving the handle 38 he is also enabled to raise br-lower the grinder-carriage and grinder.

The grinding or cutting wheel is or may 'beanyerdinarygrinderorcutter. Itisdrivcn by and preferably mounted directly on the armature-shaft of a suitable motor 61-, which in turn is mounted on trunnions 52 and 63 in the arms of afork-shaped frame B l, and is nions to anyaugle in relation to its supports that way bcdeai'red. The outer ends of said trnnmons unscrew-threaded and carry 11 uts 65 and 66, audtheforward end of one of the arms of the frame 64 is suitably formed and bears graduation-marks, as showqvm-Flg. 3, so that the adj ustment maybe accurately predetermined. The body ofthc fork-like fragne 64 iscylindrical in and a corresponding pcr oration 1 e p1 ar on the table 53 and is adapted to be clamped therein hyclamp bolfs 55 and 56. Sand fork like lrcmc therefore is capable .of-rotat-ion on a horizontal axis, thus throwing the grind.- in'g-wheol into anyofnumeross-otherangular positions Ind adapting. it to a multntudeof Men's and a great variety of work. The line-wires and'll to this motor pass in rough the'hollow-or'cylindrical portion of thc-fork-iike frame and then pass out to suitahlc'connectionsto firem'otoratthe trunnionsupports thereof, as shown especially in Filfcrc with flrefree movement-of said motor in anyandpvcry direction 7 dcd'rcd' .H' S "m8 fullydcccribed mysaid invenup and'down withcutdisengagement.' Upon thus capable of being swung on said trun- 2, no that said wires do not pre ent orinterating mechanism.

-2." Thecombination, in a grinding-machine,

with the operating-tool, of a work'carrying apparatus includingalongitudinally-movable table, a carriage-driving screw mounted in hearings in said carriage, a shaft arranged transversely to said carriage-driving screw and bearing a worm-pinion, suit-able handles on said carriage-driving screw and said shaft, and a locking-pin mounted in the frame and adapted to engage with said pinion, whereby, by means of the same apparatus, either a fast or a slow movement ofsaid carriage may be secured, substantially as shown and described. v

3. The combination, in agrinding-machine, with the work-holding mechanism,of agrinder mounted on the sliaft of'an independent motor, and said motor carrying said grinder mounted to be adjusted on the grinder-supporting frame, substantially as set forth.

4. Thecombination,inagrinding machine,

. with the work-holding mechanism, of a grind ing mechanism, an independent electric m'otor, mounted and capable of being adjnstably moved on trunnions and a grinder mounted upon and driven by the armature-shaft of said'motor.

5. Thecombination,inagrinding machine, with the work-holding mechanism, of a grinding mechanism comprising a carriage, a forkshaped frame adjustably mounted in said I carriage, an electric motoradjustably mounted in said fork-shaped frame, and a grinder 5 driven from the armature-shaft of said motor.

6. The combination,in agrinding-machine,

with adjustable workholding,mechanism, of

adjustable grinding mechanism comprising a carriage, means for adjusting said carriage horizontally, means for adjusting said .carriage vertically, a fork-shaped-metor-carrylug frame horizontally and revolubly mounted on said carriage, and a motor pi'votallymounted in said fork-shaped frame, and a grinder driven from the shaft of said motor.

7. The combination, in a grinder, of a grinding-mechanism carriage, and means for elevating and loweringthe same comprising" a hollow staudard,a hollow sleeve vertically adjustable in said standard, a hollow screwshaft foradjustiug said sleeve vertically, a gear-wheel onthe lower'end of said hollow screw-shaft, a pinion engaging with said wheel, a shaft to said pinion running to the front of the machine where it is provided with a handle, a central shaftpassing up through said hollow screw-shaft, means for revolving the same, and a connectionbetween said central shaft and the grinder-carrier table where bythe same may tie-adjusted. 8. The combination,in agrinding-machine, of the main frame, a grinder-carrying frame mounted thereon, adjustable connections between'said main frame and the standardon said grinder-carrying frame, and means for rotatably adjusting said standard on said main frame whereby the direction of the grinder may be shifted on a' verticalaxis, substantially as set forth,

9. The combination, in a grinder, of a main frame, agrinder-table-carrying frameadjnstably mounted thereon, means for elevating and lowering the same, and a central shaft passing up through the structure of said grinder-table-carrying frame,-a pinion on the upper end of said shaft, ascrew-n ut mounted in the table and-having a toothed face eugaging with said pinion, a carriage-driving screw operated by said n'ut,-a gear-wheel near the .lower end of the vertical shaft and eon: nected thereto bya spline entering a long keyway in said-shaft, a pinion engaging with said wheel, anda shaft running thence to the front of the machine whereit is provided with a handle, whereby the grinder-carrier table may be adjusted horizontally by the same inechanism irrespective of the vertical adjustment, substantially as set forth.

In witness whereof I have hereunto set my hand and seal, at Elwood, Indiana, this 20th day of January, A. D. 1900.

EDWARD start. [1... 8.]

Witnesses:

Jscon Looms, Anew L.'Hor1 na.

loo 

